Wayne williams was a suspect in the murder of a number of african-american young men and boys, but was only convicted in two cases. his conviction was based on fiber samples found on victim's bodies that matched carpet in william's home and hair samples that were consistent with william's hair. many years later, dna testing confirmed that the hair matched wayne william's hair with 98% accuracy. why wasn't the dna testing completely conclusive?

a) an insufficient number of hairs were found
b) william's had a twin who lived in the area
c) the root of the hair follicle wasn't attached
d) william's hair was identical to the victim's hair

Which statements best describe the differences or similarities between a comparative investigation and an experimental investigation? check all that apply. experimental investigations are best for showing cause-and-effect relationships, while comparative investigations do not necessarily show this type of relationship. comparative investigations are often impractical and unrealistic, while experimental investigations are the most practical and realistic kinds of investigations. comparative investigations allow for the use of a wide range of variables but do not have a control group, while experimental investigations involve variables that can be controlled. both experimental investigations and comparative investigations are designed to answer scientific questions. both experimental investigations and comparative investigations focus on making observations rather than collecting new data.